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Non-Parametric Kernel Learning with robust pairwise constraints

Content Provider	Springer Nature Link
Author	Chen, Changyou Zhang, Junping He, Xuefang Zhou, Zhi Hua
Copyright Year	2011
Abstract	For existing kernel learning based semi-supervised clustering algorithms, it is generally difficult to scale well with large scale datasets and robust pairwise constraints. In this paper, we propose a new Non-Parametric Kernel Learning ( NPKL ) framework to deal with these problems. We generalize the graph embedding framework into kernel learning, by reforming it as a semi-definitive programming ( SDP ) problem, smoothing and avoiding over-smoothing the functional Hilbert space with Laplacian regularization. We propose two algorithms to solve this problem. One is a straightforward algorithm using SDP to solve the original kernel learning problem, dented as TRAnsductive Graph Embedding Kernel ( TRAGEK ) learning; the other is to relax the SDP problem and solve it with a constrained gradient descent algorithm. To accelerate the learning speed, we further divide the data into groups and used the sub-kernels of these groups to approximate the whole kernel matrix. This algorithm is denoted as Efficient Non-PArametric Kernel Learning ( ENPAKL ). The advantages of the proposed NPKL framework are (1) supervised information in the form of pairwise constraints can be easily incorporated; (2) it is robust to the number of pairwise constraints, i.e., the number of constraints does not affect the running time too much; (3) ENPAKL is efficient to some extent compared to some related kernel learning algorithms since it is a constraint gradient descent based algorithm. Experiments for clustering based on the learned kernels show that the proposed framework scales well with the size of datasets and the number of pairwise constraints. Further experiments for image segmentation indicate the potential advantages of the proposed algorithms over the traditional k-means and N-cut clustering algorithms for image segmentation in term of segmentation accuracy.
Starting Page	83
Ending Page	96
Page Count	14
File Format	PDF
ISSN	18688071
Journal	International Journal of Machine Learning and Cybernetics
Volume Number	3
Issue Number	2
e-ISSN	1868808X
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-09-17
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Kernel learning Semi-definitive programming Graph embedding Pairwise constraint Semi-supervised learning Statistical Physics, Dynamical Systems and Complexity Artificial Intelligence (incl. Robotics) Computational Intelligence Systems Biology Pattern Recognition Control, Robotics, Mechatronics
Content Type	Text
Resource Type	Article
Subject	Artificial Intelligence Computer Vision and Pattern Recognition Software

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